Thank you RCH65, HHL and Max for feedback on my post.
From the very beginning as in the promo on July 31, 2023 "What comes next in Wheel of Challenges?", the chosen eight cache types are "Traditional Cache... Event Cache... Letterbox Hybrid".
To my understanding, according to the definition of Geocaching Events (#3.1. Geocaching Events) - https://www.geocaching.com/help/index.php?pg=kb.chapter&id=23&pgid=48 , "Geocaching Event Caches are get-togethers listed on Geocaching.com. They are organized by local geocachers and geocaching organizations. They range from meet-and-greets, to education seminars, to environmental cleanups. Anyone is welcome to attend! Events are a great way to meet fellow geocachers, learn about geocaching, and get involved in the geocaching community." - The event types on the list include CITO.
Another point of understanding in my mind... please try this on https://geocaching.com homepage... click on Community tab > Events. What can you get? Obviously, you will see a list of events. Right? Can you also see CITO event? Obviously YES!
If a so-called "regular" event (meet-and-greets for 30 minutes as a minimum) is counted to the Wheel of Challenges, I cannot see why other event types under the same defined list are not - (CITO for environmental cleanups; Mega-Events & Giga-Events for getting involved in the geocaching community.)
Just a sharing of my thought! Not getting a digital souvenir isn't going to affect my geocaching adventures.